Roel Hammerschlag

Consultant, Climate & Energy Policy Analyst


Roel is the principal of Hammerschlag LLC, specializing in greenhouse gas inventories, greenhouse gas regulation, life-cycle assessments of fuels, and renewable energy technology assessments. Recent clients have included King County, the University of Washington, the Natural Resources Defense Council, Recology CleanScapes, and the Thurston Regional Planning Council.

From 2010-2013, Roel served Washington State as the program manager for Washington’s State Energy Strategy, and from 2007-2010 Stockholm Environment Institute engaged him in the role of Senior Scientist.

Roel has applied his highly specialized knowledge in physics, thermodynamics, and life-cycle assessment to evaluating an enormous spectrum of energy resources from solar PV to genetically modified algae. Special projects have focused on the energy, materials, and greenhouse gas balances of pelletized biomass; gaseous and liquid hydrogen; deep-bore geothermal energy; biomethane generated from swine and cattle manure; recycled, used motor oil; corn ethanol; and cellulosic biofuels.

Roel earned a Bachelor of Science in Physics from the Massachusetts Institute of Technology in 1988, and a Master of Public Administration at the University of Washington in 2007, supported by fellowships from the UW Program on Climate Change and the Henry M. Jackson Foundation. In 2003 the MacArthur Foundation awarded Roel and Patrick Mazza a Grant for Research and Writing examining limits to hydrogen fuel.